Broad bean - tobacco budworm

Scientific name Heliothis assulta Guenee Lepidoptera, Noctuidae. Alias ​​tobacco moth, tobacco night moth. Distributed in North China, Central China, East China and most of the country's tobacco fields and vegetable fields, Xinjiang, Tibet can also be collected.

Host beans, peas, green peppers (bell peppers, bell peppers, bell peppers, bell peppers, peppers), tomatoes, pumpkins, tobacco, corn, etc.

The main features of the damage are green peppers. The larvae feed on buds, flowers, and fruits, and also eat on tender stems, leaves, and buds. The main reason for the reduction of production is the rot caused by fruit pods and a large number of fruit drop.

The morphological characteristics are very similar to those of cotton bollworm. The difference is that the adult body has a yellow body color and the line patterns on the forewings are clear. There is a brownish black line on the inner side of the broad brown and black midline of the hind wing and a slightly concave outer side. The eggs are slightly flattened, and the longitudinal ribs are long and short, showing a double-order pattern, and the egg holes are obvious. The larvae of the two anterior thoracic hair (L1, L2) line from the lower end of the chest valve; body surface shorter thorns. The front part of the corpus callosum is thick and short, the valve is small and low, and it rarely protrudes.

Living habits occur throughout the country, algebra is less than the cotton bollworm, in North China a year and two generations, wintering in the earth. The adult eggs are scattered and produced in prophase in the leaf veins on the back of the middle leaves of the host plants, and are produced on the tablets and fruits later. Adults can lay eggs on tomatoes, but there are few surviving larvae. The larvae are lurking between the nights and are harmed by nocturnal activities. Duration of development: eggs 3-4 days, larvae 11-25 days, 10-17 days, adults 5-7 days.

See control methods for cotton bollworm.

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